In the article by Drs. Pack and Tabah on "Dermatofibrosarcoma Protuberans: A Report of Thirty-Nine Cases" in the March issue of the Archives, page 394, the fourth sentence under the side heading "(b) Traumatic Origin" should read "In McMaster's review of 39 cases collected from the literature and his own case, trauma was alleged to have preceded the initial appearance of the tumor in eight instances." The last complete sentence on this page should read "A 74 year old woman after an interval of 19 years discovered the tumor growing in the scar of an abdominal operation."